Closed Loop Particulate Filter Regeneration Control At Limit Temperature Too Low
With regeneration running closed-loop the controller is at maximum heat-input demand yet cannot raise EGT to setpoint - typical for a load-poor drive cycle.
Affected components
- Dpf b1
Common causes
- High likelihood: Drive cycle load too low
Possible symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.